安裝pyMySQL>> pip install pyMySQL

數(shù)據(jù)連接示例#! /usr/bin/env python

# -*- coding: utf-8 -*-

"""

@author: Oscar

@file: gen_random_db

@time: 2018/11/19 14:15

"""

import string

import random

import pymysql

def gen_rand_str():

str_digits = string.digits

str_letters = string.ascii_letters

rand_str = str_digits + str_letters

rand_str = random.sample(rand_str, 10)

return ''.join(rand_str)

def db_conn():

conn = pymysql.connect("192.168.0.5", "admin", "admin", "test")

return conn

def handle_table(conn, table_name):

try:

cursor = conn.cursor() # 獲取數(shù)據(jù)庫游標(biāo)

sql = "select id, random_code from " + table_name + " where random_code is null"

update_sql = "update " + table_name + " set random_code = '%s' where id = '%s' "

cursor.execute(sql) # 執(zhí)行sql

results = cursor.fetchall() # 獲取所有表記錄

for row in results: # 遍歷數(shù)據(jù)表中的每一行

id, code = row; # 獲取行數(shù)據(jù)

if code == None:

code = gen_rand_str()

cur = conn.cursor()

cur.execute(update_sql % (code, id))

cur.close()

cursor.close()

conn.commit()

except :

print("error!")

if __name__ == '__main__':

conn = db_conn()

handle_table(conn, "tb_test")

conn.close()

總結(jié)

以上是生活随笔為你收集整理的python连接plc实例_Python连接数据库MySQL与操作示例的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。